FR49837E - Cryptographic device - Google Patents
Cryptographic deviceInfo
- Publication number
- FR49837E FR49837E FR49837DA FR49837E FR 49837 E FR49837 E FR 49837E FR 49837D A FR49837D A FR 49837DA FR 49837 E FR49837 E FR 49837E
- Authority
- FR
- France
- Prior art keywords
- cryptographic device
- cryptographic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
- G09C1/00—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
- G09C1/04—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system with sign carriers or indicators moved relative to one another to positions determined by a permutation code, or key, so as to indicate the appropriate corresponding clear or ciphered text
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR49837T | 1938-04-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR49837E true FR49837E (en) | 1939-08-08 |
Family
ID=8684936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR49837D Expired FR49837E (en) | 1938-04-01 | 1938-04-01 | Cryptographic device |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR49837E (en) |
-
1938
- 1938-04-01 FR FR49837D patent/FR49837E/en not_active Expired
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